<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>引出生命周期</title>
		<script src="../js/vue.js" type="text/javascript" charset="utf-8"></script>
	</head>
	<body>
		<div id="root">
			<h2 :style="{opacity}">欢迎学习Vue</h2>
		</div>
		<script type="text/javascript">
			Vue.config.productionTip = false
			new Vue({
				el:"#root",
				data:{
					opacity:1
				},
				methods:{
					
				},
				// Vue 完成模板的解析并把初始的真实的DOM元素放入页面后(挂载完毕)调用mounted
				mounted(){
					setInterval(() => {
						this.opacity -= 0.01
						if(this.opacity <= 0) this.opacity = 1
					})
				}

			})
		</script>
	</body>
</html>
